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Finding the Fourth Proportional to 61,870.72, 92,816.34 and 20,308

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Solution

The fourth proportional to 61,870.72, 92,816.34 and 20,308 is: 30,465.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,870.72 : 92,816.34 = 20,308 : x
  2. Step 2: Convert to fraction form
    61,870.72/92,816.34 = 20,308/x
  3. Step 3: Cross multiply
    61,870.72x = 92,816.34 × 20,308
  4. Step 4: Simplify right side
    61,870.72x = 1,884,914,232.72
  5. Step 5: Solve for x
    x = 1,884,914,232.72/61,870.72
  6. Step 6: Final answer
    x = 30,465.37

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.